Machine for producing form pieces from wet fibrous mass



Get. 4, 1938. B, F. E. N\LA1\EDER 3 3 MACHINE FOR PRODUCING FORM PIECES FROM WET FIBROUS MASS Filed Jan. 8, 1955 3 Sheets-Sheet l ll F //v vg/v 70/6 5/2 5,? Ali A/VA lq/mae Oct. 4, 1938. B, F NYLANDER 2,132,270

MACHINE FOR PRODUCING FORM PIECES FROM WET FIBROUS MASS Filed Jan. 8, 13156 3 Sheets-Sheet 2 v I 2 Q I 25 12 Q 7 a 2, II

VE/VTO/Q 5/8655 F5 Ma a/m/se zw wg Oct 4 1938 B. F. E. NYLANDER MACHINE FOR PRODUCING FORM PIECES FROM WET FIBROUS MASS Filed Jan. 8, 1956 3 Sheets-Sheet 5 jun-M,

19770/Z/l/EKS Patented Oct. 4, loss 2,132,276

UNITED STATES PATENT OFFHCE MACHINE FOR PRODUCING FORM PIECES FROM WET FIBROUS MASS Birger Fredrik Engelbrekt Nylander, Hernosand, Sweden Application January 8, 1936, Serial No. 58,046 In Germany May 27, 1935 1 Claim. (CI. 92-62) The present invention refers to machines for outside are provided with conical shoulders, producing form pieces from wet fibrous mass for against which the ring 8 presses in immersed instance wood-pulp, which consist of an exposition. In order that the part Hi shall not pansible, perforated core and a contractible, lie against the parts of the form 2 until these 5 perforated form arranged outside of the former, have been brought together, the ring 8 is conwhich consist of pieces slidably connected with nected with the plunger 9 by spring arrangeeach other, and between which the mass is adaptments 8 i. In the form 2 the core I2 is arranged ed to be led in and compressed, watered-down and fixed to a tube i3, which can be raised and and dried by the expansion of the core and conlowered. The tube i3 is worked up y y- 10 traction of the form and the introduction of a draulic means and its interior is connected with 10 warmed pressure-medium, for instance vapour. a tube M, through which steam can be intro- One of the objects of the invention is the providuced into the interior of the core l2. The mass sion of a device wherein the expansion of the core s int oduce t u a be 55 fi ed 0 t e 1111- is caused by the pressure-medium through the inderside of the stand 5, which tube is connected troduction of the same into the core. with a mass pump it and provided with a block- 15 The contraction of the form is effected in that valve ll. Between the tube is and the stand a conical ring or the like, which is provided with there is besides arranged a slidable socket 93,

a part forming the roof of the form, is pressed which also is worked upon by hydraulic pressure. over conical shoulders on the form. The parts The core i2 consists of perforated plates 69 movof the core and the form are normally taken able against and from each other, which are 20 apart or compressed by spring arrangements in or a ly brought t g he by springs 2 8 arthe core and outside the form. ranged in the core. At the collision-places be- The form is at its inside provided with outlettween the plates l9 angle-pieces 2i are arranged, channels for the water forming grooves, outside which slide in guide-bars 22 fixed to the plates.

25 which perforated plates are arranged. When a form piece is to be produced in the 25 Under the interspace between the core and the machine the ring 8 is first brought down to the form in the stand of the machine outlet-channels position shown in Fig. 1 by hydraulic pressure, are arranged for the water. whereby the parts of the form are brought to- An embodiment of the invention is shown in gether. After this the valve IT is opened, wherethe annexed drawings. Fig. 1 shows the machine by the mass from the pump it is pressed into 30 schematically in vertical longitudinal section in the tube l5 and enters the interspace between closed position. Fig. 2 shows the same in opened the core I2 and the form 2. When this interposition. Fig. 3 shows the core in vertical secspace is filled with mass, which has partly been tion in contracted position. Fig. 4 shows the watered-down by the pressure, whereby the water same in horizontal cross-section in contracted partly goes out through the tube l3 and partly 35 position. Fig. 5 shows the same in horizontal through the channels 23 in the stand i, the pump cross-section in expanded position. Fig. 6 shows It is stopped, and superfluous mass flows back the form in horizontal cross-section on one side to the pump. After this the valve l'i is closed in closed and on the other side in open position. and the socket is is brought up to the position 40 In the stand I the form 2 is arranged, which shown by lines and dots, so that the interspace 40 consists of four parts 3 (Fig. 6) movable toward between the core l2 and the form 2 forms a and away from each other. The parts 3 of the closed room except for the perforations. Now form 2, are at their inside provided with vertical overheated steam is led in to the tube I3 through conduits 4, outside of which perforated plates 5 the tube M and at the same time into the interior are fixed. The parts 3 are slidable in guide-bars of the. core l2 through the channels 24, whereby 45 in the stand I and are normally kept apart by the steam presses the parts of the core i2 outmeans of springs I fixed at standards 6. The wards and at the same time waters down, warms, parts of the form are pressed against each other dries and presses the form piece, what can take by means of a conical ring 8, which is fixed to place, as the holes of the perforations are very the lower end of a plunger 9, which is actuated by small. 50 hydraulic pressure. Over the conical ring 8 a After the form piece has been watered down, part I!) is arranged, which on immersion of the dried and pressed to the desired degree, the sup ring 8 forms a roof for the parts 3 of the form 2, ply of steam through the tube M is stopped,

, and which at its underside is shaped in a similar whereby the parts of the core i2 are contracted Way as the inside of the parts 3, which at their by the spring arrangements 20, so that the form 55 piece 25 is loosened from the core. The ring 8 is then brought up again, whereby the parts of the form 2 of the spring arrangements 1 are brought apart, so that the form piece 25 is loosened. Now the case I 8 is brought upwards again, whereby the form piece is lifted up in the machine and can be removed from the same.

The form piece produced by this machine, which is adapted to work automatically, shows quite smooth surfaces inwardly as well as outwardly and has besides a dryness of at least a result, that cannot be arrived at by the machines known hitherto, where form pieces either get a rough surface or also have to be dried after the forming by an expensiveand timewasting procedure.

It is evident that the invention may be varied in many respects without departing from the idea on which it is based.

Having now described my invention, what I claim is:

A machine for producing pieces from a wet fibrous mass, comprising a core comprising a plurality of plates movable relatively to each other, whereby said core may be expanded and contracted, and resilient means connected with said plates for maintaining said core in the contracted position, each of said plates being provided with small perforations; an expansible and contractible form, means adapted to engage said form to maintain the same in the contracted position while a form piece is being made, means maintaining said form in the expanded state when the second-mentioned means are devoid of contact with said form, means supplying a wet fibrous mass in the space between said core and said form, means connected with said form for removing a fluid therefrom, and means connected with said core for supplying a heated fluid under pressure into the interior of said core, whereby said fluid will press against the non-perforated portions of said plates to maintain said core in the expanded position and to heat and dry said wet fibrous, mass, whereby a form-piece is produced, said core being movable by the first-mentioned means from the expanded position to the contracted position when the pressure of said fluid is diminished, and said form being movable from the contracted position to the expanded position when the second-mentioned means are moved out of contact with said form, thereby facilitating the removal of said form-piece.

BIRGER FREDRIK ENGELBREKT NYLANDER. 

